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Finding the Fourth Proportional to 117,198.85, 161,722.83 and 65,506.27

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Solution

The fourth proportional to 117,198.85, 161,722.83 and 65,506.27 is: 90,392.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,198.85 : 161,722.83 = 65,506.27 : x
  2. Step 2: Convert to fraction form
    117,198.85/161,722.83 = 65,506.27/x
  3. Step 3: Cross multiply
    117,198.85x = 161,722.83 × 65,506.27
  4. Step 4: Simplify right side
    117,198.85x = 10,593,859,367.14
  5. Step 5: Solve for x
    x = 10,593,859,367.14/117,198.85
  6. Step 6: Final answer
    x = 90,392.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.